Question

.............. material is used for the manufacture of membranes in microfiltration, ultra filtration and Nanofiltration.

• A. Polyethersulfone
• B. Alumine
• C. Cellulose nitrate
• D. Polypropylene

Hint:

PES is favored in food and pharma because it has low protein binding, which reduces membrane fouling. Always look for PES or Polysulfone in membrane material questions.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question asks for a common polymer material used to fabricate membranes across multiple filtration types (MF, UF, and NF).

Step 2: Detailed Explanation:

• Membrane materials must possess high mechanical strength, thermal stability, and chemical resistance to withstand industrial cleaning processes.

• Polyethersulfone (PES): This is a versatile, high-performance thermoplastic. It is extremely popular in the food industry because it has excellent hydrolytic stability, withstands high temperatures, and can be easily fabricated with specific pore sizes for MF, UF, and NF.

• Alumine (Alumina): This is a ceramic material. While ceramic membranes are highly durable, the term "material" in this context usually defaults to the most common polymer if not specified as "ceramic."

• Cellulose Nitrate: Primarily used for lab-scale analytical filters; it lacks the chemical and thermal durability required for broad industrial MF/UF/NF applications.

• Polypropylene: Mostly used for microfiltration and as a support material, but less common for the precision molecular weight cut-offs required in ultrafiltration or the specialized layers of nanofiltration compared to PES.

• Therefore, Polyethersulfone (PES) is the most comprehensive answer for an industrial membrane material across all three categories.

Step 3: Final Answer:
Polyethersulfone is a widely used material for industrial membrane manufacturing.